I really doubt that. If the differences in attractiveness between individuals is genetic, why wouldn't it be the case as well between groups?I'll tell you what, if madows switched places with cadaans tomorrow in terms of worldly stature, the beauty standard would probably change into something more afro-centric. I don't think there's a cadaan preference gene.
And this is not a unique phenomenon to our times, there are historical anecdotes of medieval Arabs describing Cadaans as the most beautiful. Cadaan sex slaves were highly sought after and expensive where as bantu Africans were the least popular and cheapest.